The male sperm contributes an X or a Y chromosome - The percentage of water in a neonate’s body

- The male sperm contributes an X or a Y chromosome; the female ovum contributes an X chromosome.

- Fertilization produces a total of 46 chromosomes, including an XY combination (male) or an XX combination (female).

- The percentage of water in a neonate’s body is about 78% to 80%.
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